How do you know if your PCB is damaged?
With the rapid development of the mobile phone, electronics, and communication industries, it also promotes the continuous growth and rapid growth of the PCB circuit board industry. People have more and more requirements for the number of layers, weight, precision, materials, colors, and reliability of Electronic Components. Come higher.
However, due to the fierce market price competition, the cost of PCB board materials is also on a rising trend. In order to enhance their core competitiveness, more and more manufacturers have monopolized the market by low cost pcb manufacturing. However, behind these ultra-low prices are obtained by reducing material costs and process manufacturing costs, but devices are usually prone to cracks (cracks), scratches, (or scratches), and their precision, performance and other comprehensive factors have not reached the standard. , Which seriously affects the solderability and reliability of the product.
Faced with a wide variety of PCB circuit boards on the market, there are two ways to distinguish the quality of PCB circuit boards; the first method is to judge from the appearance, and the other is to judge from the quality specification requirements of the PCB board itself.
How to judge the quality of PCB circuit board:
First: distinguish the quality of the circuit board from the appearance
Under normal circumstances, the appearance of the PCB circuit board can be analyzed and judged through three aspects;
1. Standard rules for size and thickness.
The thickness of the circuit board is different from that of the standard circuit board. Customers can measure and check the thickness and specifications according to their own custom pcb fabrication.
2. Light and color.
The external circuit board is covered with ink, and the circuit board can play the role of insulation. If the color of the PCB is not bright and there is less ink, the insulation board itself is not good.
3. The appearance of the weld.
The circuit board has many PCB components. If the soldering is not good, the circuit board whose parts are easy to fall off will seriously affect the soldering quality of the circuit board. The appearance is good. It is very important to identify carefully and have a stronger interface.
Second: High-quality needs meet the following requirements
1. The product functions are required to be realized after the Electronic Components are installed, that is, the electrical connection must meet the requirements;
2. The line width, line thickness, and line distance of the line meet the requirements to prevent the line from heating, breaking, and short-circuiting;
3. The copper skin is not easy to fall off under high temperature;
4. The copper surface is not easy to oxidize, which affects the installation speed, and it will be broken soon after being oxidized;
5. There is no additional electromagnetic radiation;
6. The shape is not deformed, so as to avoid deformation of the housing and dislocation of the screw holes after installation. Now they are all mechanized installations, the hole position of the circuit board and the deformation error of the circuit and the design should be within the allowable range;
7. High temperature, high humidity and special environment resistance should also be considered;
8. The mechanical properties of the surface must meet the installation requirements;
The above is the way to judge the quality of PCB circuit boards. When buying PCB circuit boards, you must keep your eyes open. For the purchase of PCB circuit boards, we can not only consider the price, but pay more attention to the solderability and durability of the product, and purchase on the basis of meeting the basic conditions of quality. In everything, you should shop around, judge the price, service, and the manufacturer’s qualifications, customer reviews, etc., and choose a manufacturer with strength, qualification certification, and quality assurance in all aspects.
Sign in 
